Safety-lock.



SAFETY LOCK.

APPLICATION FILED JULY 31, 1913.

Patented July 21, 1914.

WI T IVESSES THE NORRIS PETERS ca., wAsl-uuarcn, we

UNITED STATES PATENT ALFRED an, or 1:\TE\VYORK, N. Y.

rronfg.

SAFETY-LOCK. 1

., more particularly to key operated locks.

One of the principal objects of my invene tion is to providea lock whichmay be adjusted to be positivelyheld in locked or un locked position, orto be locked or unlocked i at will by means of a key.

Another object is toprovide a lock which may be .quickly and easilyapplied to any door and one which has no parts liable to becomedisarrangedflor-broken. v I

A further object is to provide a safety lock which will besimple,durable, efficient in operation and inexpensive to manufacture.

These and other objects may be attained by means of the construction,combination and arrangement of parts as hereinafter more fully describedand claimed, and illustrated. in the accompanying drawings, in

which like reference characters indicate like 3 parts through theseveral views, and in which,

Figure 1, is an elevational view of a portion of the backside of a door,showing the lock applied thereto. Fig. 2, is a horizontal transversesectional view taken through a door and frame showing the lock inposition. Fig. 3, is an elevational View of the front side of the doorequipped with my lock. Fig. 1, is a fragmental view showing the guardplate, used when the-lock is attached to a door having a plane frame. I

Referring more particularly to the drawing, a circular base plate 1, issecured to the rear side of a door 2, near the outer edge thereof bymeans of screws or other fastening means 3, and this plate is centrallyapertured to receive a stub shaft 4, which has its central portionsquared as at 5, the squared portion extending through one end of alooking bar 6. A plurality of studs or lugs 7 are formed integrally withthe base plate 1, or secured thereto in any desired manner, these lugsextend rearwardly and have secured Specification of Letters Patent. 1

Application filed July 31, 1913. Serial No. vsazee Patented July 21, 191i.

thereto, by means ofscrews 8, a' cover plate 9. The plate 9., iscentrally apertured to receive the rear rounded end of stub axle 4, thefront end of said stub axle extending into a circular recess 10, formedin the rear side of the door. A reduced bore connects the recess 1.0,with the front of the door, and iv in this bore is adapted to beinserted .a cir cular key 11, whichhas its inner end formed with atongue 12adapted to engagea slot in the inner end of stub shaft 4,whereby said shaft may be turned to raiseor lower lock 1 bar 6.

.A keeper 13, is secured'to the door frame 14:, and is adapted toreceive the outer end of the lock bar 6, when in lowered position,

for holding the door in closed position. By

1 reference to Fig.1, it will be noticed that one of lugs 7, limits theupward movement of lock bar 6, but allows said lock bar to beraised asuflicient distance to clear the hook-"por tion 15 of keeper -13L' Aknob orhandle 16,

is screwed into lock bar 6, about mid-way thereof, whereby said lock barmay be raised or loweredlfrom the insideof'thedoorf A threaded apertureis formed near the justed to engage either of two recesses 18, formed inlook bar 6, said screw when engaging the lower recess as'shown in Fig.1, will hold lock bar 6 in raised position, or when engaging the upperone of recesses 18, will hold lockvbar 6, in lowered position asindicated in dotted lines in Fig. 1. It

19, which has an opening 20, therein, said opening alining with the borethrough which key 11 is adapted to extend. A disk 21, having a slot 22therein, is adapted to be seated in recess 10, between the inner end ofstub shaft 4 and shoulder formed at the junction of said recess and abore through which the key extends. Upon locking bar periphery of cover9, and is adapted to receive. athumb screw 17 whicl1.may-be lad.-

6, from the outside, the said disk may be i turned when the end oftongue 12, lies flush with the end of stub shaft 4, so as to turn theslot 22 at an angle to the slot in the end of stub shaft L, to preventthe insertion of an instrument into the last said slot for unlocking thedoor.

In cases where the inner edge of the door frame 14 is plane, (Fig. 4) aplate 23, may be secured to the inner edge of the door so as to overhangthe door frame, said plate being secured opposite the keeper, wherebythe insertion of a screw driver or other instrument between the edge ofthe door and frame, to raise the lock bar, may be prevented.

Although I have described the preferred embodiment of my invention, suchchanges may be made in the construction, combination and arrangement ofparts as do not depart from the spirit of the invention and the scope ofthe appended claims.

Having thus fully described my invention, what I claim as new and desireto secure by Letters-Patent is;

1. A safety lock comprising a plate secured to a door, a stub shaftextending therethrough, a lock bar secured at one end to said stub shaftand adapted to engage a keeper, said lock bar having a plurality ofopenings therein, a cover spaced from said plate, a thumb screw carriedby said cover and adapted to engage in either of the openings in saidlock bar for locking the latter in operative or inoperative position,and further adapted to be adjusted so as not to obstruct the path ofsaid lock bar, a key adapted to engage said stub shaft for swinging saidlock bar.

2. A safety lock comprising a base plate secured to a door, a stub shaftextending through said plate and into a recess in said door, a lock barsecured to said stub shaft adapted to engage a keeper, a cover spacedfrom said base plate and secured thereto, means carried by said baseplate for adjustably holding said lock bar in locked or unlockedposition, a key adapted to engage said stub shaft for raising orlowering said lock bar, and a disk adapted to be turned by said key forpreventing the rotation of said stub shaft by an instrument.

3. A safety lock comprising a plate secured to a door, a stub shaftextending through. said plate, a lock bar secured to said shaft andadapted to engage a keeper, means for holding said lock bar in locked orunlocked position or for permitting free movement thereof, a key toengage said stub shaft for swinging said lock bar, and means forpreventing the operation of said stub shaft by an instrument.

4. A safety lock comprising a plate secured to a door, a shaft rotatableinsaid plate, a lock bar on said shaft and adapted to engage a keeper, akey for engaging said shaft for operating said bar from the outside ofthe door, and a knob on said lock bar for operating the same from theinside of the door.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

ALFRED RE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

